CHM 096 TUTORIAL 6 Mar 2013 (ELECTROCHEMISTRY) 1. Determine the oxidation number of the first name element in the following ions. a) Cr2O72 d) AsO33 b) SbF6 e) BaH2 c) MoO42 f) ClO4− 2. Determine whether each of the reactants shown in the following half-reactions is being oxidized or reduced. a) As4+ As3+ b) Cl2O7 HClO4 c) C2H4O C2H6O d) SO2 SO42− e) Cr2O72− Cr3+ 3. Indicate whether each of the following is or
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together 31. Prepare the solution to be analyzed by placing it in a clean Erlenmeyer flask or beaker 32. Dissolve a single tablet in 500 mL of distilled water in a conical flask and add about 150 mL of distilled water‚ 5 mL of 0.6 mol L−1 potassium iodide‚ 5 mL of 1 molL−1 hydrochloric acid and 1 mL of starch indicator Solution. 33. Use the buret to deliver a stream of titrant to within a couple of mL of your expected endpoint. 34. Use a wash bottle to rinse the sides of the flask and the tip of the
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St. Joseph School/ Ramallah Chemistry lab Report Students name: Laila Salah Date of exp: 11 /4/2013 Partner’s name: Wattan Date of sub: 25 /4/2013 T.Dima Mogannam kaibni Class: 11thsci.stream -------------------------------------------------------------------------------------------------------------
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Naming Chemical Compounds PART A Name the following 1 S Sulfur 2 Sb Antimony 3 N2 Dinitrogen 4 PO43- Phosphate 5 Au Gold 6 Rb Rubidium 7 LiCl Lithium Cloride 8 AlBr3 Aluminum (III) Bromide 9 KMnO4 Potassium Manganate (VII) 10 Cu(OH)2 Copper (II) Hydroxide 11 FeSO4 Iron (II) Sulfate 12 NH4Cl Ammonium Chloride 13 ZnCO3 Zinc Carbonate 14 SnF2 Tin (II)Fluoride 15 MgSO4 Magnesium Sulfate 16 MnO2 Manganese (IV) Oxide 17 Ca3(PO4)2 Tricalcium Phosphate 18 NaOH Sodium Hydroxide
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containing silver ions is placed on a piece of copper metal? What will happen if a drop of solution containing copper ions is placed on a piece of silver metal? Chlorine and bromine are both non-metals (both negative in compounds) and both are used for disinfecting and bleaching. What will happen if chlorine is added to a solution containing bromide ions? What will happen if bromine is added to a solution containing chloride ions? Permanganate ions (MnO4-) react with iron(II) ions (Fe2+) in acid
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Experiment 1: "A cis to trans conversion" Saturday‚ June 25‚ 2005 4:19 PM Notes on Theory • Alkenes o They are hydrocarbons with a C=C double bond • Double bonds are stronger and more reactive than single bonds o Hydrocarbons with double bonds used to be known as "olefins"‚ because they had an oily appearance • "Oleum" means oil • "Ficare" means make • Isomers o Geometric isomers have the same molecular formula‚ but a different geometric arrangement • They also have different physical properties
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SYLLABUS Cambridge O Level Chemistry 5070 For examination in June and November 2014 University of Cambridge International Examinations retains the copyright on all its publications. Registered Centres are permitted to copy material from this booklet for their own internal use. However‚ we cannot give permission to Centres to photocopy any material that is acknowledged to a third party even for internal use within a Centre. © University of Cambridge International Examinations 2011 Contents
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Chemicals 0.20 M potassium iodide (KI solution)‚ 0.0050 M sodium thiosulfate (Na2S2O3 containing 0.4% starch indicator)‚ 0.10 M potassium peroxydisulfate (K2S2O8) . Procedure Part 1 : Finding the Rate Law and Rate Constant 1. The most accurate piece of glassware that allows
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SALTS AND THEIR PREPARATION SALTS A salt is a compound formed when the hydrogen ions in an acid are replaced by metal ions or by ammonium ions. Compounds in which the H+ ions in an acid have been replaced by ammonium ions (NH4+) are called ammonium salts. NOTE: •An anion is a negatively charged ion. Hence:•Hydrochloric acid gives chlorides. E.g. sodium chloride‚ ammonium chloride. •Nitric acid gives nitrates. E.g. barium nitrate‚ copper nitrate. •Sulphuric acid gives sulphates. E.g. silver sulphate
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Topic 4 - Bonding 4.1 Ionic bonds 4.1.1 Ionic bond: +ve (cations) and -ve (anions) ions are attracted to each other and form a continuous ionic lattice 4.1.2 Group 1 metals form +1 ions‚ group 2 metals form +2 ions‚ metals in group 3 form +3 ions . Examples : Li+‚ Mg2+‚ Al3+. Greater ease of ionisation Li->Cs is due to the increased electron shielding of the nuclear attraction caused by additional inner shells of electrons. The easier atoms are to ionise‚ the more reactive they
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